Other effects of heat and light, sequela

This code signifies the long-term or residual effects resulting from exposure to heat or light, excluding conditions specifically categorized elsewhere (e.g., sunstroke, heat exhaustion, sunburn). These are chronic or persistent issues that manifest after the initial acute injury has resolved.

Apply this code when documenting conditions such as chronic skin changes (e.g., scarring, dyspigmentation) due to past severe burns from heat or light, persistent neurological deficits following heatstroke, or long-term vision impairment from intense light exposure, provided these are not acute presentations. It is used when the patient is presenting for treatment or evaluation of these lasting consequences.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela (e.g., a scar code).
• Ensure the medical record clearly documents the causal link between the past heat/light exposure and the current residual condition.
• Do not use this code for acute effects; those are covered by other T67 codes without the "S" seventh character.